Heermann's Gull vs Black-headed Gull
Larus heermanni so với Larus ridibundus
Side-by-Side Comparison
| Thuộc Tính | Heermann's Gull | Black-headed Gull |
|---|---|---|
| Tên Khoa Học | Larus heermanni | Larus ridibundus |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Laridae | Laridae |
| Tình Trạng Bảo Tồn | Near Threatened | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 67,2 cm (26.5 in) | 58,2 cm (22.9 in) |
| Khối Lượng | 448,26666666666665 g (15.81 oz) | 261,0 g (9.21 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1-2 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Heermann's Gull only
Không
Black-headed Gull only
Tình Trạng Bảo Tồn
Near Threatened
Heermann's Gull
Least Concern
Black-headed Gull
About These Birds
Heermann's Gull
Heermann's Gull, 46–51 cm, is distinctive — dark grey body, white head (breeding), red bill. Breeds almost entirely on Isla Rasa in the Gulf of California, then disperses north along the Pacific coast to British Columbia. Kleptoparasite; steals fish from Brown Pelicans. Near Threatened; range highly restricted.
Black-headed Gull
Black-headed Gull, 38–44 cm, is one of Europe's commonest gulls, breeding across the Palearctic on wetlands and coasts. Chocolate-brown (not black) hood in summer, lost in winter leaving dark ear-spot. Omnivore; follows ploughs, scavenges in cities, dips for invertebrates. Migratory.